Fix keyword arguments warnings

Author: amatsuda

actionmailer/lib/action_mailer/base.rb

@@ -918,7 +918,7 @@ def set_content_type(m, user_content_type, class_default) # :doc:
       # If the subject has interpolations, you can pass them through the +interpolations+ parameter.
       def default_i18n_subject(interpolations = {}) # :doc:
         mailer_scope = self.class.mailer_name.tr("/", ".")
-        I18n.t(:subject, interpolations.merge(scope: [mailer_scope, action_name], default: action_name.humanize))
+        I18n.t(:subject, **interpolations.merge(scope: [mailer_scope, action_name], default: action_name.humanize))
       end
 
       # Emails do not support relative path links.

actionpack/test/dispatch/ssl_test.rb

@@ -9,7 +9,7 @@ class SSLTest < ActionDispatch::IntegrationTest
 
   def build_app(headers: {}, ssl_options: {})
     headers = HEADERS.merge(headers)
-    ActionDispatch::SSL.new lambda { |env| [200, headers, []] }, ssl_options.reverse_merge(hsts: { subdomains: true })
+    ActionDispatch::SSL.new lambda { |env| [200, headers, []] }, **ssl_options.reverse_merge(hsts: { subdomains: true })
   end
 end
 

activerecord/lib/active_record/schema_migration.rb

@@ -27,7 +27,7 @@ def create_table
           version_options = connection.internal_string_options_for_primary_key
 
           connection.create_table(table_name, id: false) do |t|
-            t.string :version, version_options
+            t.string :version, **version_options
           end
         end
       end

railties/test/application/middleware/cache_test.rb

@@ -38,7 +38,7 @@ def keeps_if_modified_since
           end
         private
           def render_conditionally(headers)
-            if stale?(headers.merge(public: !params[:private]))
+            if stale?(**headers.merge(public: !params[:private]))
               render plain: SecureRandom.hex(16)
             end
           end